package jdbc;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;

/**
 * 执行DML语句
 */
public class JDBCDemo2 {
    public static void main(String[] args) {
        try {
            Class.forName("com.mysql.cj.jdbc.Driver");
            Connection connection = DriverManager.getConnection(
                    "jdbc:mysql://localhost:3306/tedu?characterEncoding=utf8&useSSL=false&serverTimezone=Asia/Shanghai&rewriteBatchedStatements=true",
                    "root",
                    "root"
            );
            System.out.println("与数据库连接成功");
            Statement statement = connection.createStatement();
            /*
            INSERT INTO userinfo (username, password, nickname, age)
            VALUES('张三','12345','阿三',22);
             */
            String sql = "INSERT INTO userinfo (username,password,nickname,age) " +
                        "VALUES('张三','123456','阿三',22)";
            /*
                int executeUpdate(String sql)
                专门用来执行DML语句的，返回的int值表示执行后影响了表中多少条记录
             */
            int num = statement.executeUpdate(sql);
            if(num>0){
                System.out.println("插入成功");
            }

            connection.close();
        } catch (ClassNotFoundException | SQLException e) {
            e.printStackTrace();
        }


    }
}
